| According to the rapid development of the domestic automobile industry in recent years,the number of automobiles has greatly increased,and the safety of automobiles has become a topic of increasing concern to mankind.As the production of automobiles increases in direct proportion to human demand,the rate of traffic accidents also increases.In addition to the pressure caused by the domestic population and the number of cars,the most critical issue is the development of the car’s internal safety system.Seat belt detection performance has become a top priority in the system.However,due to the relatively weak research on seat belt system devices in China,both scientific research institutions and university enterprises are slightly lacking in relevant technologies.Therefore,in order to improve this status quo,this article has carried out relevant research on the belt feel of the seat belt,and developed a device that can conduct the seat belt feel performance test.The main research contents include:(1)Mechanical structure design with inductive performance detection deviceBased on the provisions of GB 14166-2013 for the detection of seat belt performance,the size of the equipment is designed according to ergonomic principles,and the main frame,retractor fixture,webbing fixture and motion platform of the device are designed using SolidWorks drawing software.The frame is welded with square tubes,and the surface is painted to prevent corrosion.The frame has excellent mechanical properties and meets engineering requirements.The equipment is driven by PARKER linear motor,and the operation is convenient;the equipment is designed with a pneumatic buffer device to protect the seat belt webbing and its related fixtures.The HyperMesh software is used to simulate and analyze the webbing fixture to make relevant judgments.The mechanical structure of the device has the standard for carrying out the tape experiment.(2)Design of measurement and control system with inductive performance detection deviceBased on DSP servo motion control theory and PID control theory,a measurement and control system consisting of PARKER I-FORCE Ironless Motors 41026 S linear motor,F28M35H52C1 chip,Omron PLC,board and Advantech industrial control computer was designed.The board collects and processes the acceleration,displacement and force signals in real time,then filters and stores these signals,and the acquisition control frequency is 10,000 times / second.Using LabVIEW software to write test programs and display,you can clearly show the experimental data and results.(3)Experiment and analysisIn this paper,the common 4N seat belts were tested with five gears with accelerations of 0.3g,1.0g,1.2g,1.5g and 2.0g.Calibrate the relevant sensors and set the corresponding parameters to start the experiment.The experimental results show that the experiment with the sense of sense when the acceleration is 0.3g cannot be locked,while the sense of sense with the acceleration is 1.0g,1.2g,1.5g,2.0g The experiment was successfully locked,the webbing was tensioned,and the webbing tension did not exceed 50 mm.Meet the test requirements of GB14166-2013 for car seat belts.Among them,the design of the fixture in the equipment,the output and collection of acceleration,displacement and load sensors for the signal,the innovation of this topic during the development and application of the software,the analysis of the shortcomings left by this topic in the summary,the study of the seat belt prospect. |
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